Deprecated in favour of https://github.com/WiegerWolf/clock_v3_cpp

Deps

sudo apt update
sudo apt install -y git ssh
git clone git@github.com:WiegerWolf/clock_v2_cpp.git

sudo apt install -y cmake gcc make g++ libsdl2-dev \
    libsdl2-image-dev libsdl2-ttf-dev libcurl4-openssl-dev \
    libssl-dev

Build Steps

Add .env file to the root of the project with the following content:

CEREBRAS_API_KEY='your_api_key'

Then run the following command:

./build.sh

Deployment

Make sure you have the following structure:

/home/n
├── digital_clock
├── assets/fonts/*.ttf

You get the ./digital_clock file from the build step. You get the assets folder (with fonts included) from the git clone step.

Autostart

sudo nano /etc/systemd/system/digital-clock.service

digital-clock.service:

[Unit]
Description=Digital Clock Service
After=network.target

[Service]
Type=simple
User=n
WorkingDirectory=/home/n
ExecStart=/home/n/digital_clock
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target

sudo systemctl enable digital-clock.service
sudo systemctl start digital-clock.service

Viewing Logs

The application logs to stdout/stderr, which are automatically captured by systemd. Use journalctl to view logs:

# Follow live logs (like tail -f)
sudo journalctl -u digital-clock.service -f

# View last 100 lines
sudo journalctl -u digital-clock.service -n 100

# View logs with priority/colors
sudo journalctl -u digital-clock.service -f --output=short-precise

# Filter by log level (errors and above)
sudo journalctl -u digital-clock.service -p err

# View logs from specific time
sudo journalctl -u digital-clock.service --since "1 hour ago"
sudo journalctl -u digital-clock.service --since "2025-01-15 12:00:00"

# Search for specific text
sudo journalctl -u digital-clock.service | grep "Background"

# View logs from today
sudo journalctl -u digital-clock.service --since today

# Export logs to file
sudo journalctl -u digital-clock.service > clock_logs.txt

Log Levels:

• DEBUG - Detailed debugging information
• INFO - General informational messages
• WARNING - Warning messages
• ERROR - Error messages (output to stderr)
• CRITICAL - Critical errors (output to stderr)